Registration closes March 16Format--Solo and Teams of 3 (for 50K & 50 mi only) will do this out and back course on the Standing Bear Trail.Aid Stations and check points will be along the route.Drop bags may be placed at aid stations.Relay teams may switch as often as they like but must check in at mandatory spots along the route.Info will be given at check in.Solo may get outside help with food,clothing.